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TA engineer

This is a mind map about TA engineers, including computer graphics, Graphics API, game engine, Self-developed rendering engine, Platform related etc.

Edited at 2024-02-29 14:46:56

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TA engineer

Computer Graphics

graphics algorithm

Fisheye panoramic view splicing implementation

Use opencv to implement, obtain the projection transformation matrix, dedistort the image and then splice it.

material

Bezier curve

Draw vector lines

material

rendering

PBR verification: https://www.shadertoy.com/view/4sSfzK

rotate

matrix rotation

Euler angle rotation

Quaternion rotation

The pros and cons of the three methods, mutual conversion

AABB

Basic primitives

geometry

explicit geometry

Draw various shapes such as circles, rectangles, etc. by drawing triangles

Implicit geometry (mathematical visualization)

Directed distance field (SDF)

various shapes

Ray stepping (RayMarching/RayCast)

3D Realization Camera Projection Ray Stepping Collision

Implicit 3D modeling

Step depth/normal calculation

SDF geometric surface normal solution

Shadow: gradient function calculates sdf surface normal

Base

Euclidean distance

manhattan distance

built-in functions

smoothstep

polar coordinates

Implicit graphics transformation

Pan/Rotate/Zoom

Random noise implementation

SDF shadow

hard shadow

soft shadow

ambient occlusion

SSAO

Commonly used AO algorithms

Shader information: https://thebookofshaders.com/07/?lan=ch https://github.com/patriciogonzalezvivo/thebookofshaders

Example

real-time reflection principle

image processing algorithm

linear algebra

Vector operations

addition, subtraction

Click and multiply

https://zhuanlan.zhihu.com/p/359975221

cross

https://zhuanlan.zhihu.com/p/359975221

Vector color operations

Matrix Operations

Matrix multiplication

Inverse matrix, transpose

Orthogonal, perspective, bevel, mirror

matrix transformation

2D/3D rotation, translation, zoom

Matrix derivation

characteristic

Affine transformation

Matrix derivation

characteristic

perspective transformation

Matrix derivation

characteristic

Homogeneous coordinates

Purpose and significance

Coordinate System

local coordinate system

world coordinate system

camera coordinate system

Transformation matrix derivation

Element assembly

Triangle barycenter coordinates

rasterization

mipmap

bilinear interpolation

Oversampling

UV coordinates

Trigonometric functions

3D rendering

Ray tracing:

Material properties

PBR

calculus

Graphics API

OpenGL

GLSL

Commonly used built-in functions: Built-in functions can simplify the calculation process and provide better performance

Transformation in vector UV coordinate system

Shader basics

Syntax: Shader Card github

Fragment doing shader programming

implicit geometry

SDF (directed distance field)

Ray Cast/Ray Marching

cache

VAO/VBO/EBO/FBO

Basic theory: graphics pipeline, state machine mechanism, texture sampling

Color: depth testing, stencil testing, blending, cubemaps,

Lighting: lambert, gamma correction, shadows, normal map, parallax map, HDR, boom, deferred shading

PBR: rendering theory, PBR lighting, IBL lighting

Vulkan

DirectX

OpenCV

Game Engine

Unreal engine-open source

blueprint/c

Material system

Particle System

Framework architecture/engine mechanism

Engine API/Component

animation state machine

Physics simulation (collider/trigger/raycast, etc.)

UMG interface system

unity3d

Material system

Particle System

C# script

Engine API/Engine Components

render component

Transform component

Collision component

Rigid body component

lumpyard (cryengine) - open source

playCavas - open source

cocos3d-open source

Self-developed rendering engine

Fliament

Animoji effect implementation based on Filament engine

ORGE

o3d

rendering engine

pbr rendering theory

Course Computer Graphics Shader

Function: brdf bsdf btdf electrolyte non-electrolyte metal booling-phone lambert DGF bidirectional distribution function geometric masking Fresnel no ibl illumination ibl illumination Rendering principles: Human eye imaging, perspective, light reflection principle, refraction principle, radiant flux, spherical area area

pbr rendering theory

Technology: ambient light ambient light occlusion screen space reflection environment map baking path-tracer cubemap-spherical coordinates reflection refraction linergb ldr hdr gamma correction

Forward rendering Delayed rendering G-buffer

pbr function

PBR White Paper

Output Color = Direct Light Output Color Ambient Light Output Color BRDF (Bidirectional Reflection Distribution Function): Only the light-receiving surface is processed and subsurface scattering is not considered. Suitable for opaque materials. BTDF (Bidirectional Transmission Distribution Function): only handles backlit surfaces and does not consider subsurface scattering. BSDF (bidirectional scattering [reflection transmission] distribution function): handles the light-receiving surface and the backlight surface, and does not consider subsurface scattering. Suitable for materials with relatively high transparency. BSSRDF (bidirectional scattering surface reflectance distribution function): handles the light-receiving surface and backlight, considers subsurface scattering, and is suitable for translucent materials, clouds, jade, milk, etc.

light color

Meaning of color multiplication and color addition

The multiplication of two lights represents the reduction ratio of the light

The addition of two lights often represents the merger of lights

For example, green light (0, 1, 0) becomes (0, 0.5, 0) after being reflected by a certain point A [RGB (0.3, 0.5, 0.2)], The red light (1, 0, 0) becomes (0.3, 0, 0) after being reflected at a certain point A. Then when the two lights are projected into the eyes, they are actually the merger of the two lights. For example, the final color of the object in the Shader = ambient light, self-illumination, diffuse reflection, and highlight. The multiplication of two lights often represents light intensity x ray reflection or light reflection x light intensity or light reflection x ray reflection. As a result, the light is attenuated or its reflectivity is changed.

Basic lighting

shadow

shadowmap

SSAO

gltf model pbr implementation

gltf viewer

gltf format programming

Traditional empirical lighting model

Bryn Fonn lighting model bling-phone

Color = Specular, Diffuse, Ambient

Platform related

Android rendering mechanism

https://zhuanlan.zhihu.com/p/661027517 cnblogs.com/mysweetAngleBaby/p/15549126.html

GPU rendering principle

https://zhuanlan.zhihu.com/p/649971173

Android image processing series: use of GL multi-threading https://blog.csdn.net/kaelsass/article/details/117358047

Skia rendering principle

CG technology

AR/VR/MR/Digital Human

Human eye imaging: https://www.sohu.com/a/194800446_699545